Change the mini profile on the homepage to look cleaner.
Personally, I like the second one cause it fits more with the theme, but if you could implement the third one to fit the theme would look pretty sick

Not 100% on how XenForo works anymore, it's been awhile. But I imagine it not being too difficult.

On the right side of the page there is a recent posts section, if you are idling on the homepage for whatever reason, as I do most of the day to afk chat, you have to refresh the page for the recent posts to refresh. Turning this into a widget where the posts slide down and out as they happen would be pretty neat.